Scale



Oct. 27, 1936. H. L. WALKER SCALE Original Filed May 27, 1932 IIIIIIIIIIIIII'IIII 11111111:

INVENTOR. H/wom L. WALKER, w N am,

A TTORNEYS.

Patented Oct. 27, 1936 UNITED STATES PATENT OFFICE SCALE Harold L. Walker, Brooklyn, N.

Y., assignor to Original application M ay 27, 1932, Serial No. Divided and this application November 10, 1934, Serial No. 752,413

8 Claims.

This invention relates to a structurally and functionally improved scale.

This application is a division of application Serial Number 613,889, filed May 27, 1932, on scale, which has matured into Patent 2,033,212.

It is an object of the invention to provide a scale, by means of which, in an improved manner, tare weight may be disposed of.

A further object of the invention is that of furnishing a scale in which the bearing parts will at all times be properly disposed with reference to each other.

Among other objects of the invention are the furnishing of an apparatus of this character which will embody relatively few and rugged parts, each individually simple in construction and capable of quick assemblage and set-up to provide a scale capable of being sold at nominal cost and operating over long periods of time with freedom from difficulty.

With these and other objects in mind, reference is had to the attached sheets of drawing illustrating embodiments of the invention, and in which:

Fig. 1 is a partly sectional front view of a scale;

Fig. 2 is an end view thereof;

Fig. 3 is a, transverse sectional view taken along the lines 33 and in the direction of the arrows in Fig. 1;

Fig. 4 is a fragmentary view of the poise beam; and

Fig. 5 is a transverse sectional view taken along the lines 5-5 and in the direction of the arrows in Fi 4.

In these several views the numeral l indi-' cates a scale base from which a standard or bracket portion ll extends upwardly. At the ends of this bracket there are provided, in the usual manner, bearings l2 of any desired type and material. These bearings rockingly support a beam I3 by means of pivots l4. As shown, a pan support I is rockingly mounted on bearing members I6 at the end of the short beam arm,

a this support being extended through the scale base as at IT, and its lower end pivotally secured to one end of a link l8, the opposite end of which is similarly connected to the base and in line with the bearing portions l2--l4.

The opposite arm of the beam is extended through a guide-guard plate I9. In order that loads imposed within or upon the pan 2! may be weighed, it is intended that a poise beam 28 be employed which is mounted upon supports 29 extending from the beam l3- This is, of ourse,

in addition to any suitable counter-weight structure which will usually be employed. Poise beam 28 is provided with suitable graduations (not shown), the sub-divisions of which are traversed by pointers 29 forming parts of weights 30 and 3| slidably mounted by the beam 28. In order to provide for such mounting, it is preferred that the weight 30 have one or more extensions 32 riding within the slot 33 of the beam, it being noted, as in Fig. 5, that a securing element 34 may be attached to the projection 32 to prevent displacement of the weight 30. The weight 3| has its end portion slidably embracing the upper and lower edges of the beam and is formed with a centrally recessed portion permitting of the passage of the projections 32 and the retaining elements 34 associated therewith. In this manner it is obvious that loads imposed upon the pan may be accurately weighed.

In certain instances a portion of such loads may be a constant factor and the balance of the loads may be the variable factor, the weight value of which is to be determined. Thus, the constant factor may be allowed for by tare-weight provision. According to the present invention, this result is achieved by slidably mounting the beam 28 for bodily movement longitudinally of the beam I 3. To this end the projections 29-or continuations thereof-extend through slots 35 in the beam 28, and adjacent one end of the latter an adjusting screw 36 is provided which bears against the oifset end 31 of this beam and engages the corresponding threads in an opening formed in the outer end of the beam l3. A spring 38 may, for example, constantly urge the end 31 of the beam 28 into contact with the end of the screw 36, but in any event it will be understood that as a result of the foregoing it is practicable to adjust the beam 28 longitudinally of the beam I 3.

Thus, with a given load factor, and the weights 303l in their zero position, it is practicable to shift the beam 28 so as to bring the beam l3 to an even balance condition and compensate for the tare-weight. This will in no wise afiect the registration of the tare-weight value as subsequently established by shifting the weights 30-3 l In scales of this general type, considerable difficulty has been experienced'due to the fact that the beam tends to shift transversely of its supports, and with this in mind numerous expedients have been resorted to. By means of the present invention it is proposed to overcome these difficulties by employing thrust elements in line with the bearings or pivots. As shown in Fig. 2, an

extension 40 is provided as part of the support l5 and an extension M is provided in line with the extension 40 and also in line with the pivot element I5, the laiter extension forming a part of the beam l3. Interposed between these ex tensions is a link element 39 which prevents the support from shifting with respect to the beam. As shown in Fig, 3, a further extension 42 is provided as part of the beam and in line with the pivots l4 carrying iiie beam. An extension 43 forms a part of one of the supports H. A link element 44, being provided between these latter extensions, it is likewise obvious that shifting oi? the beam with respect to the supporting bracket l I is prevented, and consequently these two links while in no wise interfering with the operation of the scale, do definitely prevent an improper shifting of the part and make unnecessary the various expense factors heretofore resorted to in order to overcome the previously recognized difflculties in this connection. It will, of course, be understood that the plane of the support of the bearing parts l4, l5 and I6 is identical with the beam in a position of rest. It wil also be noted that incident to the stop 45 the link connected to the pan support prevents the latter from elevating to a point at which separation of the bearing parts might occur,

Thus, among others, the several objects of the invention as specifically aiore noted, are achieved. Obviously. numerous changes and rearrangements of the parts might be resorted to without departing from the spirit of the invention as defined by the claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A scale including, in combination, a base, a rockingly mounted beam, a supporting member pivotally carried by said beam and a transversely extending link member coupling said beam to said base at the point of rocking mounting of the former to "ent transverse shifting of said beam with relerence to the structure mounting the same,

2, A scale including, in combination, a rockingly mounted beam, a supporting member pivotally carried by said beam and a transversely extending link member coupling said supporting member to said beam at the point of pivotal mounting of the former and preventing transverse movement ci said member with reference to said beam.

3. A scale including, in combination, a base, a rockingly mounted beam, a supporting member pivotally carried by said beam, a transversely extending link member coupling said beam to said base at he point oi rocking mounting of the former to prevent transverse shifting of said beam with relference to the structure mountin the same, and a second ti'ai'lsvers extending link. member coupling said supp ng member to said beam at the point of pivots. ounting of said supporting riieml-er and pre ting transverse movement of the former v/i. 1 reference to said beam.

4. A scale including a rockingly mounted beam, a pan support rockingly positioned upon said beam, a link plvotally connected to said pan support, and a stop cooperating with said link. to prevent said pan support being lifted from said beam.

5. A including, in combination, a rockingly :lnounted beam, a substantially coextensive poise beam carried by said first named beam, and spaced therefrom, means for laterally and freely shifting said poise beam with respect to said first named beam, at primary poise weight slid ably mounted by said poise beam, a secondary poise weight also mounted by said poise beam and movable with respect thereto, said secondary poise weight being independent of said primary poise weight and both said weights traversing similar areas of said poise beam.

5. A scale including, in combination, a in ingly mounted main beam, a poise beam oonne ed to said main beam and being formed with a slot extending longitudinally of its body, a pose weight slidably mounted upon said poise beam and extending out of contact with the edges of said slot, and a second weight slidably mounted by said poise beam and riding wit said slot.

7. A scale including, in combin: n, a main beam, means for rockingly mounting said beam, a poise beam in advance of said main beam, one of said beams being formed with longitudinally extending slots, projections extending substan' tially perpendicular to the face of the second of said beams and riding in sliding contact with the edges of said slots, and a poise weight mounted by said poise beam.

8. A scale includinzi, ingly mounted main coupled to said i,

in combination, a rockam, a poise beam slidably beam, a rearwardly projecting extensio "ming a part of said poise beam and overla ng the end of said main beam, and an adjusting screw operatively coupled to said poise beam and having screw threaded engagement with said main beam for effecting relative movements of said beams.

HAROLD L. WALKER. 

